Revert 264167 "Sniff MIME type for files which have unknown exte..."

trunk/src/chrome/test/data/extensions/platform_apps/launch_application_octet_stream/test.js

Index: trunk/src/chrome/test/data/extensions/platform_apps/launch_application_octet_stream/test.js
===================================================================
--- trunk/src/chrome/test/data/extensions/platform_apps/launch_application_octet_stream/test.js	(revision 264191)
+++ trunk/src/chrome/test/data/extensions/platform_apps/launch_application_octet_stream/test.js	(working copy)
@@ -18,7 +18,18 @@
       chrome.test.assertTrue(
           chrome.fileSystem.retainEntry(launchData.items[0].entry) != null);
 
-      chrome.test.succeed();
+      launchData.items[0].entry.file(function(file) {
+        var reader = new FileReader();
+        reader.onloadend = function(e) {
+          chrome.test.assertEq(
+              reader.result.indexOf("This is a test. Word."), 0);
+          chrome.test.succeed();
+        };
+        reader.onerror = function(e) {
+          chrome.test.fail("Error reading file contents.");
+        };
+        reader.readAsText(file);
+      });
     }
   ]);
 });